Bumblebees love to jump into California Poppies and roll around in the pollen. Bumblebees drink nectar and eat pollen - nothing else. It has been estimated that a full honey-stomach will give a bumblebee about 40 minutes of flying time. Without the energy in nectar a bumblebee cannot fly. Late in the season males and young queens leave the nest and mate. Then old males, queens, and workers die. The new queens overwinter and the cycle continues.